tmp88cu74 TOSHIBA Semiconductor CORPORATION, tmp88cu74 Datasheet - Page 75

• Manufacturer Part Number: tmp88cu74
• Description: Cmos 8-bit Microcontroller
• Manufacturer: TOSHIBA Semiconductor CORPORATION

Table 2.8.1 Source Clock (Internal Clock) for Timer/Counter 3 (Example: at fc = 12.5 MHz, fs = 32.8 kHz)
TC3CK
TC3CK
00
00
01
10
Resolution [µs]
Resolution
(2) Event counter mode
327.68
81.92
10.24
488.28
[µs]
SLOW, SLEEP Mode
falling edge can be selected. Edge selection is the same as for INT3 pin. The contents of
TREG3A are compared with the contents of the up-counter. If a match is found, an
INTTC3 interrupt is generated and the counter is cleared.
cycles are required for both the high and low levels of the pulse width.
in TC3CR) to “1”. SCAP is automatically cleared to “0” after capturing.
DV1CK = 0
In this mode, the TC3 pin input pulses are used for counting up. Either the rising or
The maximum applied frequency is shown in Table 2.8.2. Two or more machine
The current contents of up-counter are loaded into TREG3B by setting SCAP (bit 6
Table 2.8.2 Source Clock (External Clock) for Timer/Counter
Example: Generates an interrupt every 0.5 s, inputting 50 Hz pulses to the TC3 pin.
Setting Time
Maximum
NORMAL1/2, IDLE1/2 Mode
83.6
20.9
[ms]
2.6
Setting Time
Maximum
124.5
DV7CK = 0
[ms]
fc/2
LD
LD
Resolution
655.36
163.84
4
10.48
Maximum Applied Frequency [Hz]
[µs]
DV1CK = 1
(TREG3A), 19H
(TC3CR), 00011110B
88CU74-75
NORMAL1/2, IDLE1/2 Mode
Setting Time
Maximum
167.8
41.7
[ms]
5.2
SLOW, SLEEP Mode
Resolution
488.28
122.07
8
[µs]
fs/2
DV1CK = 0
4
;
;
Setting Time
0.5 s ÷ 1/50 = 25 = 19H
Starts TC3
Maximum
124.5
31.1
[ms]
2.0
DV7CK = 1
Resolution
488.28
122.07
16
[µs]
DV1CK = 1
TMP88CU74
2007-10-19
2003-02-17
Setting Time
Maximum
124.5
31.1
[ms]
4.1